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1510. 85,936. PATENTED JAN. 19, 1869. 4

D. KELLER.

- DREDGE-OHUCK.

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mfssaae. PATENTED'JAN. 19, 186 9. 1). KELLER.

DREDGE CHUCK.

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DANIEL KELLER, 0F BALTIMORE, MARYLAND.- Letters PcumtNo. 85,936, dated January 19,1869.

DREDGE-CHUCK m Schedule referred to in these Letters Patent and part of the pane. I

Be it known that I, DANIEL KELLER, of the city and county of Baltimore, in the State of Maryland, have invented a newand improved Dredge-Chuck; and .I do

;hereby declarethat the'following is a full, clear, and

exact description thereof, reference being bad to the accompanying drawings, making a part of this specification, in which Figure 1 is a perspective view of the improved dredgechuck,representin g the drag-rope in the position it would occupy while dragging for oysters.

Figure 2 is a side elevation of.the chuck, showing the rope in nearly a perpendicularposition, as it would appearwhen in the act of hauling in the load.

Similar letters of reference indicate corresponding parts in both figures.

This invention relates to a new and useful improvement on dredge-chucks, which are applied to the sides of oyster-boats, and designed to hold the rope, to which the drag-netor dredge is attached, in a proper position while gathering aload, and also prevent the chafing of the vessel while hauling in a load.

Hitherto a long roller has been used, over which the dredge-rope passed, and over which it was drawn in and payed out. v

Another plan consisted in applying a chuck-block and swivel-pulley at one end of a roller, over which plglieythe dredge-rope was passed while gathering a Botlrof these plans were found objectionable on account of the rapid wearing away of the chuck-block, and also the dredge-rope.

The nature of my invention consists in the application of one or more grooved and tapering rollers to the outer face of the chuck-block, and in so arranging suchrollers that the dredge-rope shall not be allowed contact with the surface of the said block, but shall work freely, and with comparatively little friction upon the rollers, as will be hereinafter explained.

To enable others skilled in the art to understand my invention, I will describe its construction andoperation.

In the accompanying drawings- A represents the side of a vessel.

B, the chuck-block, which is secured, in a rigid manner, to the side of the vessel, so that, it extends a short distance above the guard thereof, and inclines toward the bow, as shown in figs. 1 and 2-. p

O is a roller, which is supported at one end in a beari'ng formed in the chuck-block B, and at the other end in a bearing rising from the top edge ofthe vesscls I guard.

To. this chuck-block'B, I apply one or more rollers,-

' each one of which has a central concave portion, g, ter-.

minated by cones g/ g, which rollers are inserted partly into recesses formed in the outer face of the block B,

and provided with bearings, 11 d, at their extremities, which bearings keep the rollers in their places, and allow them to turn freely about their axes. v

I prefer to use three rollers, E .E' F, arranged substantiallyas described, in the face of the block B, so that about one-half of the diameter of each- 'roll'erwill project beyond the face of. this block.

The two roller's'E E receive the rope D. upon thei faces during the operation of gathering a load, when said rope will be in about the position shown in fig. 1, and the lowermost roller F receives the rope D during the act of drawing in aload, and'aiter the rope leaves the rollers E E, just before it falls to a perpendicular position with respect to the vessel, as shown infig.2.

The rope D'passes off over the roller 0, and some- I times will assume such an angle around the chuck-block B that it is found desirable to carve away the edges of this block, opposite the rollers thereon, as shown at a, b, and c.

From this description of my improvcd'dredge-chuck,

it will be seen that therope D will not be in contact with rolling or anti-friction surfaces during the opera tion of gathering a load, as well as.wllen drawing in the load; consequently, neither the said block nor the rope will be rapidly worn away. i

If the rollers E, E, or F, should become much worn after long use, the same can be readily removed, and others substituted in their place.

Having described my invention,

What I claim as new, and desire to secure by Letters Patent, is- 1. A dredge-chuck, B, having one or more grooved and tapering rollers inserted into its outer face, substantially as described.

2. An anti-friction dredge-chuck, B, having its outer I 

